You may need a subscription to the New York Times to be able to read this article. But I hope you can, as it applies directly to our wintering birds, although much of Washington is less stressful in winter than the New England area mentioned.
https://www.nytimes.com/2025/01/29/realestate/birds-winter-survival-strategies.html?unlocked_article_code=1.tE4.00NC.jJt6NgL4hpFA&smid=em-share
But here also, more and more bird species are wintering, both because of ameliorating temperatures and, perhaps even more so, our network of bird feeders.
Dennis Paulson
Seattle